CN111208681B - Light modulation box, display panel and driving method - Google Patents
Light modulation box, display panel and driving method Download PDFInfo
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- CN111208681B CN111208681B CN202010048742.7A CN202010048742A CN111208681B CN 111208681 B CN111208681 B CN 111208681B CN 202010048742 A CN202010048742 A CN 202010048742A CN 111208681 B CN111208681 B CN 111208681B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1323—Arrangements for providing a switchable viewing angle
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
Abstract
The invention discloses a display panel, which comprises a display liquid crystal box, wherein the display liquid crystal box comprises a color film substrate, an array substrate and a first liquid crystal layer, wherein the array substrate is arranged opposite to the color film substrate, the first liquid crystal layer is positioned between the color film substrate and the array substrate, the color film substrate is provided with a touch electrode layer and a visual angle control electrode at one side facing the first liquid crystal layer, the array substrate is provided with a common electrode at one side facing the first liquid crystal layer, the touch electrode layer comprises a plurality of touch electrode blocks and a plurality of touch wires, the plurality of touch electrode blocks are respectively and electrically connected with a touch chip through the touch wires, and each touch wire corresponds to a whole row or column of touch electrode blocks. Each touch control wire is designed to correspond to a whole row or column of touch control electrode blocks, so that the touch control wires are uniformly distributed on the whole surface of the display panel, the light transmittance of the whole surface of the display panel is the same, the influence on the normal display of a picture is avoided, and the displayed picture quality is improved. The invention also discloses a dimming box and a driving method.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a dimming box, a display panel and a driving method.
Background
A Liquid Crystal Display (LCD) has advantages of good picture quality, small size, light weight, low driving voltage, low power consumption, no radiation, and relatively low manufacturing cost, and is dominant in the field of flat panel displays. The liquid crystal display device includes a color filter substrate and a thin film transistor array substrate which are oppositely disposed, and a liquid crystal layer interposed therebetween.
Liquid crystal display devices are now gradually developed toward wide viewing angles, and wide viewing angles can be realized by using liquid crystal display devices of an in-plane switching mode (IPS) or a fringe field switching mode (FFS). However, in the current society, people pay more and more attention to protecting their privacy, and do not like to take out and share with people. In public places, the content is always expected to be kept secret when the user watches a mobile phone or browses a computer. Therefore, the display with single viewing angle mode has not been able to satisfy the user's requirement. In addition to the requirement of a wide viewing angle, there is also a need to be able to switch or adjust the display device to a narrow viewing angle mode where privacy is required.
At present, touch control of a display screen is basically of an external hanging type, so that a touch control box needs to be additionally prepared outside a display device, for example, the touch control box is arranged outside a color film substrate. Of course, some display panels are in-cell touch panels, for example, a touch layer is disposed on the array substrate for touch control, the touch signal-to-noise ratio of the in-cell touch panel changes with the display frames, and different display frames have different liquid crystal arrangements to cause different self-capacitances, which requires a long time to adjust the signal-to-noise ratio to meet the required requirements. In addition, in the structure, a high-resistance film is required to be plated on the color film substrate to prevent static electricity.
However, in the existing display panel having both wide and narrow viewing angle switching and touch control functions, as shown in the figure, in the existing touch control box, one end of the touch control trace is connected to the touch control chip, the other end of the touch control trace is connected to the touch control electrode block, and the touch control trace is a whole strip electrode.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a dimming box, a display panel and a driving method, so as to solve the problem of poor display image quality caused by uneven touch routing arrangement in the display panel in the prior art.
The purpose of the invention is realized by the following technical scheme:
the invention provides a display panel, which comprises a display liquid crystal box, wherein the display liquid crystal box comprises a color film substrate, an array substrate and a first liquid crystal layer, the array substrate is arranged opposite to the color film substrate, the first liquid crystal layer is positioned between the color film substrate and the array substrate, a touch electrode layer and a visual angle control electrode are arranged on one side, facing the first liquid crystal layer, of the color film substrate, a common electrode is arranged on one side, facing the first liquid crystal layer, of the array substrate, the touch electrode layer comprises a plurality of touch electrode blocks and a plurality of touch wires, the touch electrode blocks are respectively electrically connected with a touch chip through the touch wires, and each touch wire corresponds to an entire row or column of the touch electrode blocks.
The invention provides a display panel, which comprises a display liquid crystal box and the dimming box, wherein the display liquid crystal box comprises a color film substrate, an array substrate arranged opposite to the color film substrate and a first liquid crystal layer positioned between the color film substrate and the array substrate; the light adjusting box comprises a second liquid crystal box and a light adjusting box body, wherein the second liquid crystal box comprises a first substrate, a second substrate and a second liquid crystal layer, the second substrate is arranged opposite to the first substrate, the second liquid crystal layer is positioned between the first substrate and the second substrate, a touch electrode layer and a visual angle control electrode are arranged on one side, facing the second liquid crystal layer, of the first substrate, an auxiliary electrode matched with the visual angle control electrode is arranged on one side, facing the second liquid crystal layer, of the second substrate, the touch electrode layer comprises a plurality of touch electrode blocks and a plurality of touch wires, the touch electrode blocks are respectively electrically connected with a touch chip through the touch wires, and each touch wire corresponds to a whole row or column of the touch electrode blocks.
Furthermore, each touch trace is formed by arranging a plurality of electrode units, each electrode unit is of a prismatic frame structure, and the plurality of touch traces form a grid shape and are distributed on the display panel.
Furthermore, a plurality of through holes are arranged on the touch electrode block, and the through holes correspond to the edges of the electrode units and are disconnected at the inflection points of the electrode units.
Furthermore, the touch electrode block is in a grid shape corresponding to the touch trace.
Furthermore, the touch electrode block is of a planar rectangular structure.
Furthermore, a plurality of through holes are arranged on the touch electrode block, the through holes are of a prismatic frame structure, and the through holes arranged in a whole row or column are connected in pairs.
Furthermore, a plurality of through holes are formed in the touch electrode block, the through holes are of a strip-shaped structure in a zigzag shape, and the through holes extend along the touch wiring direction.
The invention also provides a light adjusting box, which comprises a second liquid crystal box, wherein the second liquid crystal box comprises a first substrate, a second substrate and a second liquid crystal layer, the second substrate is arranged opposite to the first substrate, the second liquid crystal layer is positioned between the first substrate and the second substrate, a touch electrode layer and a visual angle control electrode are arranged on one side of the first substrate facing the second liquid crystal layer, an auxiliary electrode matched with the visual angle control electrode is arranged on one side of the second substrate facing the second liquid crystal layer, the touch electrode layer comprises a plurality of touch electrode blocks and a plurality of touch wires, the touch electrode blocks are respectively electrically connected with a touch chip through the touch wires, and each touch wire corresponds to a whole row or column of the touch electrode blocks.
The present invention also provides a driving method for driving the display panel as described above, the method comprising:
and applying the same voltage signal to the touch electrode block and the visual angle control electrode in the blank time period of two adjacent frame intervals, wherein the frequency of the voltage signal is 80-200 KHz.
The invention has the beneficial effects that: the display panel comprises a display liquid crystal box, the display liquid crystal box comprises a color film substrate, an array substrate and a first liquid crystal layer, the array substrate is arranged opposite to the color film substrate, the first liquid crystal layer is positioned between the color film substrate and the array substrate, the color film substrate is provided with a touch electrode layer and a visual angle control electrode on one side facing the first liquid crystal layer, the array substrate is provided with a common electrode on one side facing the first liquid crystal layer, the touch electrode layer comprises a plurality of touch electrode blocks and a plurality of touch wires, the plurality of touch electrode blocks are respectively electrically connected with a touch chip through the touch wires, and each touch wire corresponds to a whole row or column of touch electrode blocks. Each touch control wire is designed to correspond to a whole row or column of touch control electrode blocks, so that the touch control wires are uniformly distributed on the whole surface of the display panel, the light transmittance of the whole surface of the display panel is the same, the influence on the normal display of a picture is avoided, and the displayed picture quality is improved.
Drawings
FIG. 1 is a schematic plane structure diagram of a touch electrode layer according to the present invention;
fig. 2 is an enlarged schematic structural diagram of a touch electrode layer in a touch electrode block area according to a first embodiment of the present invention;
fig. 3 is a schematic plan view illustrating a touch trace according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a display panel with a wide viewing angle according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a display panel with a narrow viewing angle according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a display panel according to a second embodiment of the present invention;
FIG. 7 is a schematic diagram of a display panel with a narrow viewing angle according to a second embodiment of the present invention;
fig. 8 is an enlarged schematic structural diagram of the touch electrode layer in a touch electrode block area according to a third embodiment of the present invention;
fig. 9 is a schematic plan view of a touch electrode block according to a third embodiment of the present invention;
fig. 10 is an enlarged schematic structural diagram of a touch electrode layer in a touch electrode block area according to a fourth embodiment of the present invention;
fig. 11 is a schematic plan view of a touch electrode block according to a fourth embodiment of the present invention;
fig. 12 is an enlarged schematic structural diagram of the touch electrode layer in a touch electrode block area according to a fifth embodiment of the present invention;
fig. 13 is a schematic plan view of a touch electrode block according to a fifth embodiment of the present invention;
fig. 14 is an enlarged schematic structural diagram of the touch electrode layer in a touch electrode block area according to a sixth embodiment of the present invention;
fig. 15 is a schematic plan view of a touch electrode block according to a sixth embodiment of the present invention;
fig. 16 is a waveform diagram of voltages applied to a display panel in the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the dimming box, the display panel and the driving method according to the present invention with reference to the accompanying drawings and preferred embodiments is as follows:
[ example one ]
Fig. 1 is a schematic plan view of a touch electrode layer in the present invention, fig. 2 is an enlarged structure diagram of a touch electrode layer in a touch electrode block area in a first embodiment of the present invention, fig. 3 is a schematic plan view of a touch trace in the first embodiment of the present invention, fig. 4 is a schematic plan view of a display panel in the first embodiment of the present invention at a wide viewing angle, and fig. 5 is a schematic plan view of a display panel in the first embodiment of the present invention at a narrow viewing angle.
As shown in fig. 1 to 5, a display panel according to a first embodiment of the present invention includes a color filter substrate 10, an array substrate 20 disposed opposite to the color filter substrate 10, and a first liquid crystal layer 30 located between the color filter substrate 10 and the array substrate 20. In an initial state, the positive liquid crystal molecules in the first liquid crystal layer 30 are aligned parallel to the color filter substrate 10 and the array substrate 20, the alignment direction of the positive liquid crystal molecules close to the color filter substrate 10 is antiparallel to the alignment direction of the positive liquid crystal molecules close to the array substrate 20, and at this time, the display panel has a wide viewing angle. Certainly, the positive liquid crystal molecules may have a smaller pretilt angle (e.g., smaller than 7 °) during initial alignment, that is, the positive liquid crystal molecules initially form a smaller included angle with the color filter substrate 10 and the array substrate 20, and the positive liquid crystal molecules may be accelerated to deflect toward the vertical direction when switching to the narrow viewing angle. Of course, in other embodiments, negative liquid crystal molecules may also be used in the first liquid crystal layer 30, and the invention is not limited thereto.
The color filter substrate 10 is provided with color resist layers 12 arranged in an array and a black matrix 11 separating the color resist layers 12, and the color resist layers 12 include color resist materials of three colors of red (R), green (G), and blue (B), and correspondingly form sub-pixels of three colors of red (R), green (G), and blue (B).
The array substrate 20 is defined by a plurality of scanning lines and a plurality of data lines which are insulated from each other and crossed on one side facing the first liquid crystal layer 30 to form a plurality of pixel units, a pixel electrode 23 and a thin film transistor are arranged in each pixel unit, the pixel electrode 23 is electrically connected with the data line of the adjacent thin film transistor through the thin film transistor, and a common electrode 21 is further arranged on one side of the array substrate 20 facing the liquid crystal layer 30. In this embodiment, as shown in fig. 4, the common electrode 21 and the pixel electrode 23 are located at different layers and insulated and isolated by the insulating layer 22. The common electrode 21 may be located above or below the pixel electrode 23 (the common electrode 21 is shown below the pixel electrode 23 in fig. 4). Preferably, the common electrode 21 is a planar electrode disposed over the entire surface, and the pixel electrode 23 is a block electrode disposed in one block in each pixel unit or a slit electrode having a plurality of electrode bars to form a Fringe Field Switching (FFS) mode. Of course, In other embodiments, the pixel electrode 23 and the common electrode 21 are located on the same layer, but are insulated and isolated from each other, and each of the pixel electrode 23 and the common electrode 213 may include a plurality of electrode stripes, and the electrode stripes of the pixel electrode 23 and the electrode stripes of the common electrode 21 are alternately arranged with each other to form an In-plane switching (IPS) mode. The thin film transistor includes a gate electrode, an active layer, a drain electrode and a source electrode, the gate electrode and the scan line are located on the same layer and electrically connected, the gate electrode and the active layer are isolated by an insulating layer, the source electrode and the data line are electrically connected, the drain electrode and the pixel electrode 23 are electrically connected through a contact hole, and further detailed description of the array substrate is omitted herein with reference to the prior art.
The color film substrate 10 is further provided with an upper polarizer 41, the array substrate 20 is further provided with a lower polarizer 42, and transmission axes of the upper polarizer 41 and the lower polarizer 42 are perpendicular to each other.
In this embodiment, the color filter substrate 10 is provided with a touch electrode layer 13 and a viewing angle control electrode 14 on a side facing the first liquid crystal layer 30, the touch electrode layer 13 and the viewing angle control electrode 14 are isolated by an insulating layer, the viewing angle control electrode 14 is preferably arranged on the whole surface, or the viewing angle control electrode 14 may be distributed in an array and individually controlled by a thin film transistor, and the viewing angle control electrode 14 is matched with the common electrode 21 to form a vertical electric field between the viewing angle control electrode 14 and the common electrode 23 (E2 in fig. 5). The touch electrode layer 13 includes a plurality of touch electrode blocks 131 and a plurality of touch traces 132, the touch electrode blocks 131 are arranged in an array on the color filter substrate 10, the touch electrode blocks 131 and the touch traces 132 are respectively located on different layers and are isolated by an insulating layer, the plurality of touch electrode blocks 131 are respectively electrically connected to the touch chip 133 through the touch traces 22, and the touch chip 133 can be connected to a processor through the FPC boards 134 on both sides or can be connected to the processor through the FPC board 134 on the side away from the touch electrode blocks 131. Each touch trace 132 corresponds to an entire row of touch electrode blocks 131, that is, the length of each touch trace 132 is the same as the length of the touch electrode layer 13, and each touch trace 132 is in contact connection with the corresponding touch electrode block 131 through an opening in the insulating layer, as shown in fig. 1. Of course, in other embodiments, the plurality of touch traces 132 may also extend laterally, and each touch trace 132 corresponds to an entire row of touch electrode blocks 131.
In this embodiment, each touch trace 132 is formed by arranging a plurality of electrode units 132a, each electrode unit 132a is a prismatic frame structure, the width of each edge of the electrode unit 132a is less than 220um, and the plurality of touch traces 132 are distributed on the display panel in a grid shape, so that the light transmittance of the whole surface of the display panel is more uniform, and the display image quality is further improved. The touch electrode block 131 can be connected to the touch traces 132 at the corners of the electrode unit 132a through the openings, and two adjacent touch traces 132 are insulated and separated from each other and do not interfere with each other. The touch electrode block 131 is a planar rectangular structure, the touch electrode block 131 may also be a square with a side length of 3.8mm-4.2mm, and each touch electrode block 131 may cover a plurality of sub-pixels or even one sub-pixel.
The color film substrate 10 and the array substrate 20 may be made of glass, acrylic acid, polycarbonate, and other materials. The materials of the common electrode 21, the pixel electrode 23, the touch electrode layer 13, and the viewing angle control electrode 14 may be Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or the like.
As shown in fig. 4, in the wide viewing angle mode, a dc common voltage Vcom is applied to the common electrode 21, and no voltage is applied to the viewing angle control electrode 14, so that the voltage difference between the viewing angle control electrode 14 and the common electrode 21 is zero or less than a preset value. The pixel electrode 23 applies a corresponding gray scale voltage V1 (fig. 16), a voltage difference is formed between the pixel electrode 23 and the common electrode 21 and a horizontal electric field is generated (E1 in fig. 4), so that the positive liquid crystal molecules are deflected in a direction parallel to the horizontal electric field in the horizontal direction, the gray scale voltage includes 0-255 gray scale voltages, the polarity of each Frame (Frame) of the gray scale voltage V1 is changed once, the frequency of the gray scale voltage V1 can be 60Hz, and when different gray scale voltages are applied to the pixel electrode 23, the pixel unit displays different brightness, thereby displaying different pictures, and realizing normal display of the display panel under a wide viewing angle.
As shown in fig. 5, in the narrow viewing angle mode, a viewing angle control voltage V2 (fig. 16) having a larger amplitude than the common voltage Vcom on the common electrode 21 is applied to the viewing angle control electrode 14, the frequency of the viewing angle control voltage V2 may be 60-144Hz, preferably 75Hz, the voltage difference between the viewing angle control electrode 14 and the common electrode 21 is larger than a predetermined value (e.g. 5V), a vertical electric field (E2 in fig. 5) is formed between the color filter substrate 10 and the array substrate 20, the positive liquid crystal molecules are greatly deflected in the vertical direction, so that large-angle viewing light leakage occurs in the display panel, the contrast ratio is reduced in the oblique viewing direction and the viewing angle is narrowed, and the display panel finally realizes narrow viewing angle display. The pixel electrode 23 applies a corresponding gray scale voltage V1 (fig. 16), a voltage difference is formed between the pixel electrode 23 and the common electrode 21 and a horizontal electric field is generated (E1 in fig. 5), so that the positive liquid crystal molecules are deflected in a direction parallel to the horizontal electric field in the horizontal direction, the gray scale voltage includes 0-255 gray scale voltages, the polarity of each Frame (Frame) of the gray scale voltage V1 is changed once, the frequency of the gray scale voltage V1 can be 60Hz, and when different gray scale voltages are applied to the pixel electrode 23, the pixel unit displays different brightness, thereby displaying different pictures, and realizing normal display of the display panel under a narrow viewing angle.
No matter in the wide viewing angle mode or the narrow viewing angle mode, the touch electrode blocks 131 apply the touch signals through the touch traces 132, when the user touches the display panel, a capacitance is formed between the finger and the touch electrode block 131 corresponding to the touch position, i.e., self-capacitance touch, the electric quantity on the touch electrode block 131 changes, and the touch chip 133 can sense the change of the electric quantity on the touch electrode block 131 corresponding to the touch position of the user, so as to detect the touch position of the user on the display panel, thereby implementing the touch function.
[ example two ]
As shown in fig. 6 and 7, a display panel according to a second embodiment of the present invention is substantially the same as the display panel according to the first embodiment (fig. 1 to 5), except that in this embodiment, the display panel includes a display liquid crystal cell and a light modulation box for controlling a viewing angle, the display liquid crystal cell includes a color filter substrate 10, an array substrate 20 disposed opposite to the color filter substrate 10, and a first liquid crystal layer 30 located between the color filter substrate 10 and the array substrate 20, and the light modulation box includes a first substrate 50, a second substrate 60 disposed opposite to the first substrate 50, and a second liquid crystal layer 70 located between the first substrate 50 and the second substrate 60. The display liquid crystal cell is preferably disposed below the dimming cell, and the display liquid crystal cell may also be disposed above the dimming cell. The first substrate 50 and the second substrate 60 may be common transparent substrates, and the first liquid crystal layer 30 and the second liquid crystal layer 70 may both adopt positive liquid crystal molecules or negative liquid crystal molecules, and in this embodiment, the positive liquid crystal molecules are taken as an example for illustration. The upper polarizer 41 is disposed between the color filter substrate 10 and the second substrate 60. The display liquid crystal cell can be an IPS display mode, a VA display mode or a TN display mode.
In this embodiment, the color filter substrate 10 does not need to be provided with the touch electrode layer 13 and the viewing angle control electrode 14, the first substrate 50 is provided with the touch electrode layer 13 and the viewing angle control electrode 14 on a side facing the second liquid crystal layer 70, the second substrate 60 is provided with the auxiliary electrode 61 matching with the viewing angle control electrode 14 on a side facing the second liquid crystal layer 70, and the viewing angle control electrode 14 matches with the auxiliary electrode 61 to form a vertical electric field between the viewing angle control electrode 14 and the auxiliary electrode 61 (E2 in fig. 7). Of course, the second substrate 60 and the color filter substrate 10 may be combined into one substrate, that is, the second substrate 60 or the color filter substrate 10 is removed.
The touch electrode layer 13 includes a plurality of touch electrode blocks 131 and a plurality of touch traces 132, the plurality of touch electrode blocks 131 are respectively electrically connected to the touch chip 133 through the touch traces 22, each touch trace 132 corresponds to a whole row of touch electrode blocks 131, that is, the length of each touch trace 132 is the same as the length of the touch electrode layer 13, and each touch trace 132 is in contact connection with the corresponding touch electrode block 131 through an opening in the insulating layer, as shown in fig. 1. Of course, in other embodiments, the plurality of touch traces 132 may also extend laterally, and each touch trace 132 corresponds to an entire row of touch electrode blocks 131.
As shown in fig. 6, in the wide viewing angle mode, a dc common voltage Vcom is applied to the common electrode 21, and no voltage is applied to the viewing angle control electrode 14 and the auxiliary electrode 61, so that the voltage difference between the viewing angle control electrode 14 and the auxiliary electrode 61 is zero or less than a preset value. The pixel electrode 23 applies a corresponding gray scale voltage V1 (fig. 16), a voltage difference is formed between the pixel electrode 23 and the common electrode 21 and a horizontal electric field is generated (E1 in fig. 6), so that the positive liquid crystal molecules are deflected in a direction parallel to the horizontal electric field in the horizontal direction, the gray scale voltage includes 0-255 gray scale voltages, the polarity of each Frame (Frame) of the gray scale voltage V1 is changed once, the frequency of the gray scale voltage V1 can be 60Hz, and when different gray scale voltages are applied to the pixel electrode 23, the pixel unit displays different brightness, thereby displaying different pictures, and realizing normal display of the display panel under a wide viewing angle.
As shown in fig. 7, in the narrow viewing angle mode, a viewing angle control voltage V2 (fig. 16) having a large magnitude with respect to the common voltage Vcom on the auxiliary electrode 61 is applied to the viewing angle control electrode 14, i.e., a dc common voltage Vcom is applied to the auxiliary electrode 61, and a viewing angle control voltage V2 is applied to the viewing angle control electrode 14. Of course, the viewing angle control electrode 14 may apply the dc common voltage Vcom, the auxiliary electrode 61 may apply the viewing angle control voltage V2, the frequency of the viewing angle control voltage V2 may be 60-144Hz, preferably 75Hz, the voltage difference between the viewing angle control electrode 14 and the common electrode 21 is greater than a predetermined value (e.g., 5V), a vertical electric field (E2 in fig. 7) is formed between the first substrate 50 and the second substrate 60, the positive liquid crystal molecules are greatly deflected in the vertical direction, the display panel is exposed to large-angle observation light, the contrast is reduced in the oblique direction, the viewing angle is narrowed, and the display panel finally achieves narrow-viewing-angle display. The pixel electrode 23 applies a corresponding gray scale voltage V1 (fig. 16), a voltage difference is formed between the pixel electrode 23 and the common electrode 21 and a horizontal electric field is generated (E1 in fig. 5), so that the positive liquid crystal molecules are deflected in a direction parallel to the horizontal electric field in the horizontal direction, the gray scale voltage includes 0-255 gray scale voltages, the polarity of each Frame (Frame) of the gray scale voltage V1 is changed once, the frequency of the gray scale voltage V1 can be 60Hz, and when different gray scale voltages are applied to the pixel electrode 23, the pixel unit displays different brightness, thereby displaying different pictures, and realizing normal display of the display panel under a narrow viewing angle.
No matter in the wide viewing angle mode or the narrow viewing angle mode, the touch electrode blocks 131 apply the touch signals through the touch traces 132, when the user touches the display panel, a capacitance is formed between the finger and the touch electrode block 131 corresponding to the touch position, i.e., self-capacitance touch, the electric quantity on the touch electrode block 131 changes, and the touch chip 133 can sense the change of the electric quantity on the touch electrode block 131 corresponding to the touch position of the user, so as to detect the touch position of the user on the display panel, thereby implementing the touch function.
Compared with the first embodiment, in the present embodiment, a second liquid crystal cell is additionally disposed and used for controlling the viewing angle and the touch, so as to reduce interference generated by the pixel electrode 23, the viewing angle control electrode 14, and the touch electrode layer 13, and improve the viewing angle switching effect and the touch sensitivity.
It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.
[ third example ]
As shown in fig. 8 and 9, a display panel according to a third embodiment of the present invention is substantially the same as the display panel according to the first embodiment (fig. 1 to 5), except that in the present embodiment, a plurality of through holes 131a are disposed on the touch electrode block 131, the through holes 131a are in a prismatic frame structure, the width of the through holes 131a is 5um to 10um, the through holes 131a arranged in a whole row or column are connected in pairs, and the electrode blocks in the frame of the prismatic through holes 131a are relatively isolated and are not used for applying touch signals.
Compared with the first embodiment, in the present embodiment, the touch electrode block 131 is made into the patterned structure, so that the area of the actual working area of the touch electrode block 131 is reduced, and the charge amount of the touch electrode block 131 can be reduced, thereby reducing the touch delay.
It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.
[ example four ]
As shown in fig. 10 and fig. 11, a display panel according to a fourth embodiment of the present invention is substantially the same as the display panel according to the first embodiment (fig. 1 to fig. 5), except that in the present embodiment, a plurality of through holes 131a are disposed on the touch electrode block 131, the through holes 131a are a zigzag stripe structure, and the through holes 131a extend along the direction of the touch trace 132, that is, each touch electrode block 131 is a comb-shaped electrode. The width of the through holes 131a is 5um-10um, and the width of the interval between two adjacent through holes 131a is 10um-20 um.
Compared with the first embodiment, in the present embodiment, the touch electrode block 131 is made into the patterned structure, so that the area of the actual working area of the touch electrode block 131 is reduced, and the charge amount of the touch electrode block 131 can be reduced, thereby reducing the touch delay.
It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.
[ example five ]
As shown in fig. 12 and 13, a display panel according to a fifth embodiment of the present invention is substantially the same as the display panel according to the first embodiment (fig. 1 to 5), except that in the present embodiment, a plurality of through holes 131a are disposed on the touch electrode block 131, and the through holes 131a correspond to the edges of the electrode units 132a and are disconnected at the inflection points of the electrode units 132a, that is, the through holes 131a are integrally of a prismatic frame structure. The width of the through-hole 131a is 10um-50 um.
Compared with the first embodiment, in the present embodiment, the touch electrode block 131 is made into the patterned structure, so that the area of the actual working area of the touch electrode block 131 is reduced, and the charge amount of the touch electrode block 131 can be reduced, thereby reducing the touch delay.
It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.
[ sixth example ]
As shown in fig. 14 and fig. 15, a display panel provided in a sixth embodiment of the present invention is substantially the same as the display panel in the first embodiment (fig. 1 to fig. 5), except that in the present embodiment, the touch electrode blocks 131 are in a grid shape corresponding to the touch traces 132. The width of the touch electrode block 131 is greater than the width of the touch trace 132, and the width of the touch electrode block 131 exceeding the touch trace 132 is 1um-2 um.
Compared with the first embodiment, in the present embodiment, the touch electrode block 131 is made into the patterned structure, so that the area of the actual working area of the touch electrode block 131 is reduced, and the charge amount of the touch electrode block 131 can be reduced, thereby reducing the touch delay.
It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again
The invention also provides a display device comprising the display panel.
The present invention is also a driving method for driving the display panel as described above, the method comprising:
as shown in fig. 16, during normal display, a corresponding gray scale voltage V1 (fig. 16) is applied to the pixel electrode 23, a voltage difference is formed between the pixel electrode 23 and the common electrode 21 and a horizontal electric field is generated (E1 in fig. 5), so that the positive liquid crystal molecules are deflected in a direction parallel to the horizontal electric field in the horizontal direction, the gray scale voltage includes 0-255 gray scale voltages, the gray scale voltage V1 changes polarity once per Frame (Frame), the frequency of the gray scale voltage V1 may be 60Hz, and when different gray scale voltages are applied to the pixel electrode 23, the pixel unit exhibits different brightness, thereby displaying different pictures. In a blank time period T between two adjacent frames, the same voltage signal (V3, V4) is applied to the touch electrode block 131 and the viewing angle control electrode 14, the frequency of the voltage signal is 80-200KHz, that is, in the blank time period T, a high-frequency voltage is applied to both the touch electrode block 131 and the viewing angle control electrode 14, so as to eliminate an induced voltage difference between the touch electrode block 131 and the viewing angle control electrode 14, reduce touch delay, enable the touch electrode block 131 to work normally, and do not affect normal display of the display panel and normal switching of the wide and narrow viewing angles.
In this document, the terms upper, lower, left, right, front, rear and the like are used for defining the positions of the structures in the drawings and the positions of the structures relative to each other, and are only used for the clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims. It is also to be understood that the terms "first" and "second," etc., are used herein for descriptive purposes only and are not to be construed as limiting in number or order.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A display panel comprises a display liquid crystal box, wherein the display liquid crystal box comprises a color film substrate (10), an array substrate (20) arranged opposite to the color film substrate (10) and a first liquid crystal layer (30) positioned between the color film substrate (10) and the array substrate (20), it is characterized in that a touch electrode layer (13) and a visual angle control electrode (14) are arranged on one side of the color film substrate (10) facing the first liquid crystal layer (30), the array substrate (20) is provided with a common electrode (21) on the side facing the first liquid crystal layer (30), the touch electrode layer (13) comprises a plurality of touch electrode blocks (131) and a plurality of touch wires (132), the touch electrode blocks (131) are respectively electrically connected with a touch chip (133) through the touch wires (132), and each touch wire (132) corresponds to a whole row or column of the touch electrode blocks (131).
2. The display panel is characterized by comprising a display liquid crystal box and a dimming box, wherein the display liquid crystal box comprises a color film substrate (10), an array substrate (20) arranged opposite to the color film substrate (10) and a first liquid crystal layer (30) positioned between the color film substrate (10) and the array substrate (20); the light box comprises a first substrate (50), a second substrate (60) arranged opposite to the first substrate (50) and a second liquid crystal layer (70) positioned between the first substrate (50) and the second substrate (60), the first substrate (50) is provided with a touch electrode layer (13) and a viewing angle control electrode (14) on the side facing the second liquid crystal layer (70), the second substrate (60) is provided with an auxiliary electrode (61) which is matched with the viewing angle control electrode (14) at one side facing the second liquid crystal layer (70), the touch electrode layer (13) comprises a plurality of touch electrode blocks (131) and a plurality of touch wires (132), the touch electrode blocks (131) are respectively electrically connected with a touch chip (133) through the touch wires (132), and each touch wire (132) corresponds to a whole row or column of the touch electrode blocks (131).
3. The display panel according to claim 1 or 2, wherein each touch trace (132) is formed by arranging a plurality of electrode units (132a), the electrode units (132a) are of a prismatic frame structure, and the plurality of touch traces (132) are distributed on the display panel in a grid shape.
4. The display panel according to claim 3, wherein the touch electrode block (131) is provided with a plurality of through holes (131a), and the through holes (131a) correspond to the edges of the electrode units (132a) and are disconnected at the inflection points of the electrode units (132 a).
5. The display panel according to claim 3, wherein the touch electrode blocks (131) are in a grid shape corresponding to the touch traces (132).
6. The display panel according to claim 1 or 2, wherein the touch electrode block (131) is a planar rectangular structure.
7. The display panel according to claim 1 or 2, wherein the touch electrode block (131) is provided with a plurality of through holes (131a), the through holes (131a) are in a prismatic frame structure, and the through holes (131a) arranged in a row or a column are connected in pairs.
8. The display panel according to claim 1 or 2, wherein the touch electrode block (131) is provided with a plurality of through holes (131a), the through holes (131a) are strip-shaped structures with a zigzag shape, and the through holes (131a) extend along the direction of the touch trace (132).
9. A light modulation box comprises a first substrate (50), a second substrate (60) arranged opposite to the first substrate (50), and a second liquid crystal layer (70) positioned between the first substrate (50) and the second substrate (60), characterized in that the first substrate (50) is provided with a touch electrode layer (13) and a viewing angle control electrode (14) on the side facing the second liquid crystal layer (70), the second substrate (60) is provided with an auxiliary electrode (61) which is matched with the viewing angle control electrode (14) at one side facing the second liquid crystal layer (70), the touch electrode layer (13) comprises a plurality of touch electrode blocks (131) and a plurality of touch wires (132), the touch electrode blocks (131) are respectively electrically connected with a touch chip (133) through the touch wires (132), and each touch wire (132) corresponds to a whole row or column of the touch electrode blocks (131).
10. A driving method for driving the display panel according to any one of claims 1 to 8, the method comprising:
and applying the same voltage signal to the touch electrode block (131) and the visual angle control electrode (14) in a blank time period (T) of two adjacent frame intervals, wherein the frequency of the voltage signal is 80-200 KHz.
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| CN113936613B (en) * | 2020-06-29 | 2023-07-07 | 京东方科技集团股份有限公司 | Driving method and driving device of display panel, display device and storage medium |
| CN111812896B (en) * | 2020-07-14 | 2022-08-26 | 昆山龙腾光电股份有限公司 | Touch peep-proof screen and control method thereof |
| CN111999926A (en) * | 2020-09-10 | 2020-11-27 | 京东方科技集团股份有限公司 | Light-adjusting glass |
| CN112269288B (en) * | 2020-11-03 | 2023-03-31 | 天马微电子股份有限公司 | Light control liquid crystal box, display panel, display device and display method thereof |
| CN112416174B (en) * | 2020-11-25 | 2022-11-25 | 信利(仁寿)高端显示科技有限公司 | Touch display panel light leakage analysis method, touch display panel and manufacturing method |
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